Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Production of Foamed Glass by Induction Heating Method

인덕션 가열법을 이용한 발포유리제조

  • Sun, Hongshuai (Dept. of Chemical and Biological Engineering, Gachon University) ;
  • Yoo, In-Sang (Dept. of Chemical and Biological Engineering, Gachon University)
  • 손홍수 (가천대학교 화공생명공학과) ;
  • 유인상 (가천대학교 화공생명공학과)
  • Received : 2017.05.31
  • Accepted : 2017.07.20
  • Published : 2017.10.10
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Abstract

The application possibility of an alternative new method with low energy consumption was studied for the eco-friendly fabrication of foamed glasses from waste glasses. As a result, fabricating temperature can be reduced under $300^{\circ}C$ without using various expensive inorganic oxidants. The foamed glass can be fabricated at a proper mixing ratio of the waste glass powder, water glass, little surfactant and bubble stabilizer by induction heating method. In the experimental range, the assured optimal condition is 4 min heating on the induction machine with a steel-container ($100mm{\times}100mm{\times}20mm$) and followed by evaporating and drying process for 11 min with 110 g of glass powder, 80 g of water glass, 3 g of surfactant and 0.2 g of bubble stabilizer. When the foamed glass was fabricated at the optimal condition, the density of the glass was $0.85g/cm^3$ and the heat conduction was $0.052W/h{\cdot}K$. In addition, the compressive strength of the glass was above $50kg/cm^2$.

폐유리의 친환경적 재사용을 목적으로 발포유리를 제조하는데 있어서 에너지 소모가 상대적으로 적은 '인덕션 가열법'을 적용한 결과 제조온도를 $300^{\circ}C$ 이하로 낮출 수 있으며 고가의 각종 무기산화제를 첨가하지 않고, 인체에 무해한 폐유리가루, 물유리와 소량의 계면활성제와 기포안정제만을 사용하여 발포유리를 제조할 수 있었다. 본 실험의 실험범위에서 확인한 최적의 조건은 유리가루 110 g, 물유리 80 g, 계면활성제 3 g과 안정제 0.2 g을 사용하여 특수 제작한 철제용기($100mm{\times}100mm{\times}20mm$)를 이용하여 인덕션 가열장치에서 비등시켜 4 min간 가열 후 11 min 증발, 건조시킨 경우, 제조한 발포유리의 이때 밀도는 $0.85g/cm^3$, 열전도도 $0.052W/h{\cdot}K$, 압축 강도도 $50kg/cm^2$ 이상으로 분석되었다.

Keywords

References

  1. C. T. Lee, The recycling of waste glass - Manufacture of foamglass and its prospect, Prospect. Ind. Chem., 3(2), 1-15 (2000).
  2. T. Takei, H. Ota, Q. Dong, A. Miura, Y. Yonesaki, N. Kumada, and H. Takahashi, Preparation of porous material from waste bottle glass by hydrothermal treatment, Ceram. Int., 38, 2153-2157 (2012). https://doi.org/10.1016/j.ceramint.2011.10.057
  3. S. Hasheminia, A. Nemati, B. E. Yekta, and P. Alizadeh, Preparation and characterization of diopside-based glass-ceramic foams, Ceram. Int., 38, 2005-2010 (2012). https://doi.org/10.1016/j.ceramint.2011.10.035
  4. I. Blute, R. J. Pugh, J. van de Pas, and I. Callaghan, Silica nanoparticle sols 1. surface chemical characterization and evaluation of the foam generation (foamability), J. Colloid Interface Sci., 313, 645-655 (2007). https://doi.org/10.1016/j.jcis.2007.05.013
  5. A. S. Laudis, M. J. O. Tari, F. J. G. Ten, E. Bernardo, and P. Colombo, Foaming of flat glass cullet using $Si_3N_4$ and $MnO_2$ powders, Ceram. Int., 35, 1953-1959 (2009). https://doi.org/10.1016/j.ceramint.2008.10.022
  6. E. Bernardo, R. Cedro, M. Florean, and S. Hreglich, Reutilization and stabilization of wastes by the production of glass foams, Ceram. Int., 33, 963-968 (2007). https://doi.org/10.1016/j.ceramint.2006.02.010
  7. C. T. Lee and H. G. Lee, Production of foamed glass by using hydrolysis of waste glass (1) - Hydrolysis of waste glass, J. Korean Ind. Eng. Chem., 16, 519-526 (2005).
  8. C. T. Lee, H. G. Lee, and E. H. Um Production of foamed glass by using hydrolysis of waste glass (II) - Foaming process of hydrated glass, J. Korean Ind. Eng. Chem., 16, 760-767 (2005).
  9. C. T. Lee and E. H. Um, Production of foamed glass by using hydrolysis of waste glass (III) - Heat treatment for stabilization and scale-up Test J. Korean Ind. Eng. Chem., 17, 73-81 (2006).
  10. C. T. Lee, J. Lee, M. Jang, and S. Lee, Physical and chemical properties of waste LCD glass as raw materials for the production of foaminglass J. Korean Ind. Eng. Chem., 16, 266-272 (2009).
  11. C. T. Lee, T. M. park, and J. M. Kim, Foaming process of waste LCD glass for the recovery of valuable materials from waste LCD pannell, Appl. Chem. Eng., 23, 195-203 (2012).
  12. J. M. Kim and C. T. Lee, Preparation of foamed glass block from recycled soda lime silicate glasses by chemical composition control, Appl. Chem. Eng., 24, 382-390 (2013).
  13. C. T. Lee, Production process of foamed glass by compressive shaping, Appl. Chem. Eng., 24, 239-246 (2013).
  14. An improved manufacturing method of insulating material foamed glass using induction heating method, and therefore insulating material foamed glass, Korean Patent (pending) 10 2-012-0010113 (2012).
  15. H. S. Sun, Production of Foamed Glass by Boiling Method, MS Thesis, Gachon University, Gyeonggi-do, Korea (2014).
  16. Y. P. Kong, Properties and Heat Insulating Characteristics of the Expanded Sodium Silicate Ceramics Depending on Heat Treatment Temperatures, MS Thesis, Chungnam National University, Daejeon, Korea (2008).